An Online Measuring Method of the Parameters for Asymmetric Transmission Lines

doi:10.7652/xjtuxb201602014

您当前的位置：

首页 >

文章列表页 >

An Online Measuring Method of the Parameters for Asymmetric Transmission Lines

更新时间：2025-07-09

- An Online Measuring Method of the Parameters for Asymmetric Transmission Lines
- Vol. 50, Issue 2, Pages: 80-84(2016)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201602014
  CLC： TM726
- Online First：10 February 2016，
  
  Published：2016
- 稿件说明：
移动端阅览
An Online Measuring Method of the Parameters for Asymmetric Transmission Lines[J]. 2016, 50(2): 80-84.
DOI：

An Online Measuring Method of the Parameters for Asymmetric Transmission Lines[J]. 2016, 50(2): 80-84. DOI： 10.7652/xjtuxb201602014.

摘要

针对输电线路参数在线测量方法存在不能对线路导纳参数及非对称输电线路参数进行测量的问题

提出了一种基于输电线路∏型模型的非对称输电线路参数在线测量新方法。该方法首先根据三相非对称输电线路的∏型模型

建立起线路参数计算的电路方程

然后针对该线路参数计算方程的欠定性

提出了一种独特的欠定方程求解方法。该方法通过对输电线路两端电压和电流进行多次测量

建立求解线路导纳参数的超定方程

应用复数域内的最小二乘法

推导出导纳参数的计算公式

并利用导纳参数

推导出线路阻抗参数计算公式。仿真结果表明

线路零序阻抗及导纳模误差分别为-0.011%、-0.119%

正序阻抗及导纳模误差分别为-0.005 1%、0.064%

远小于实际工程误差要求。该方法不仅可以求得输电线路的阻抗与导纳参数

以及线路的正序、负序、零序以及各序间的耦合参数

解决了线路参数在线测量法不能求解导纳及非对称线路参数的问题

还具有很高的计算精度

可为三相非对称输电线路参数的在线测量提供理论依据。

Abstract

In view of the difficulty for measuring transmission line admittance parameters and asymmetric transmission line parameters in the existing online measuring methods

a novel online measuring method based on the ∏ model of three-phase asymmetric transmission lines is proposed. And the transmission line equations for parameter calculation are established

the underdetermined equations are solved with a new algorithm. The overdetermined equations for admittance parameters are established with multiple synchronous measurement signals of voltage and current on both sides of the transmission lines

and the calculation formula of admittance parameters for asymmetric transmission lines is derived by least square method

then the calculation formula of impedance parameters is derived according to the admittance parameters. The simulation shows that the errors of transmission lines zero sequence impedance and admittance reach -0.011% and -0.119%

respectively

the positive sequence impedance and admittance errors reach -0.005 1% and 0.064%

respectively

which are greatly less than the engineering requirement. This method enables to evaluate the impedance and admittance parameters of transmission lines

positive sequence

negative sequence and zero sequence parameters of lines and coupling parameters among each sequence with higher calculation accuracy.

关键词

Keywords

references

于涛, 陈文文. 输电线路工频量参数测试方法综述 [J]. 机电工程技术, 2009, 38(2): 74-77.

YU Tao, CHEN Wenwen. Analysis of means to measure power frequency parameters of transmission line [J]. Mechanical and Electrical Engineering Technology, 2009, 38(2): 74-77.

梁志瑞, 武长青, 苏海锋, 等. 一种耦合传输线参数在线测量方法 [J]. 电力系统保护与控制, 2012, 40(8): 126-130.

LIANG Zhirui, WU Changqing, SU Haifeng, et al. A parameter measuring method of coupling transmission lines [J]. Power System Protection and Control, 2012, 40(8): 126-130.

梁志瑞, 宫瑞邦, 牛胜锁. 双回耦合输电线路的零序参数在线测量 [J]. 电力自动化设备, 2013, 33(7): 70-74.LIANG Zhirui, GONG Ruibang, NIU Shengsuo. Online measuring of zero-sequence parameters for coupled double-circuit transmission line [J]. Electric Power Automation Equipment, 2013, 33(7): 70-74.

赵德奎. 架空输电线路工频参数测量研究 [D]. 成都: 西南交通大学, 2010.

宫瑞邦. 输电线路工频参数在线测量的研究 [D]. 河北保定: 华北电力大学, 2013.

邱关源, 罗先觉. 电路 [M]. 5版. 北京: 高等教育出版社, 2006: 427-429.

谷湘潜, 康红文, 曹鸿兴. 复数域内的最小二乘法 [J]. 自然科学进展, 2006, 16(1): 49-54.

GU Xiangqian, KANG Hongwen, CAO Hongxing. The least square method in the complex field [J]. Progress in Natural Science, 2006, 16(1): 49-54.

赵艳军, 陈晓科, 尹建华, 等. 同塔双回输电线路工频阻抗参数测试方法研究 [J]. 电工技术学报, 2015, 30(2): 255-260.

ZHAO Yanjun, CHEN Xiaoke, YIN Jianhua, et al. A new measurement method of the power frequency impedance parameters of double-circuit transmission lines on same tower [J]. Transactions of China Electrotechnical Society, 2015, 30(2): 255-260.

吴彤. 基于空间磁场的同杆并架双回线动态物理模型的研究 [D]. 武汉: 华中科技大学, 2011.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effects of Steam Addition on the Swirl Combustion and Emission Characteristics of Cracked Ammonia

A Fast Calculation Method for Thermal Flow Fields in Transformer Windings Based on PI-DeepONet

Effects of Expansion Angle Crater Film Hole on the Film Cooling Characteristics of a Double-Wall Structure

Diffusion Characteristics and Influencing Factors in Case of Hydrogen Leakage from Fuel Cell Vehicles Running in Tunnels

Research on the Electrohydrodynamic Effects of Ionic Liquid-Modified Fuels

Related Author

No data

Related Institution

No data

⁰